VTask.hh

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//
// MIT License
// Copyright (c) 2020 Jonathan R. Madsen
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED
// "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Tasking class header file
//
// Class Description:
//
// This file creates an abstract base class for the thread-pool tasking
// system
//
// ---------------------------------------------------------------
// Author: Jonathan Madsen (Feb 13th 2018)
// ---------------------------------------------------------------
 
#pragma once
 
#include <cstddef>
#include <cstdint>
#include <functional>
#include <thread>
 
namespace PTL
{
//======================================================================================//
 
/// \brief VTask is the abstract class stored in thread_pool
class VTask
{
public:
    using tid_type    = std::thread::id;
    using size_type   = size_t;
    using void_func_t = std::function<void()>;
 
public:
    VTask(bool _is_native, intmax_t _depth)
    : m_is_native{ _is_native }
    , m_depth{ _depth }
    {}
 
    VTask()          = default;
    virtual ~VTask() = default;
 
    VTask(const VTask&) = delete;
    VTask& operator=(const VTask&) = delete;
 
    VTask(VTask&&) = default;
    VTask& operator=(VTask&&) = default;
 
public:
    // execution operator
    virtual void operator()() = 0;
 
public:
    bool     is_native_task() const { return m_is_native; }
    intmax_t depth() const { return m_depth; }
 
protected:
    bool        m_is_native = false;
    intmax_t    m_depth     = 0;
    void_func_t m_func      = []() {};
};
 
//======================================================================================//
 
}  // namespace PTL